1 /* debuginfod utilities for GDB.
2 Copyright (C) 2020 Free Software Foundation, Inc.
3
4 This file is part of GDB.
5
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
10
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with this program. If not, see <http://www.gnu.org/licenses/>. */
18
19 #include "defs.h"
20 #include <errno.h>
21 #include "cli/cli-style.h"
22 #include "gdbsupport/scoped_fd.h"
23 #include "debuginfod-support.h"
24
25 #ifndef HAVE_LIBDEBUGINFOD
26 scoped_fd
debuginfod_source_query(const unsigned char * build_id,int build_id_len,const char * srcpath,gdb::unique_xmalloc_ptr<char> * destname)27 debuginfod_source_query (const unsigned char *build_id,
28 int build_id_len,
29 const char *srcpath,
30 gdb::unique_xmalloc_ptr<char> *destname)
31 {
32 return scoped_fd (-ENOSYS);
33 }
34
35 scoped_fd
debuginfod_debuginfo_query(const unsigned char * build_id,int build_id_len,const char * filename,gdb::unique_xmalloc_ptr<char> * destname)36 debuginfod_debuginfo_query (const unsigned char *build_id,
37 int build_id_len,
38 const char *filename,
39 gdb::unique_xmalloc_ptr<char> *destname)
40 {
41 return scoped_fd (-ENOSYS);
42 }
43 #else
44 #include <elfutils/debuginfod.h>
45
46 struct user_data
47 {
user_datauser_data48 user_data (const char *desc, const char *fname)
49 : desc (desc), fname (fname), has_printed (false)
50 { }
51
52 const char * const desc;
53 const char * const fname;
54 bool has_printed;
55 };
56
57 static int
progressfn(debuginfod_client * c,long cur,long total)58 progressfn (debuginfod_client *c, long cur, long total)
59 {
60 user_data *data = static_cast<user_data *> (debuginfod_get_user_data (c));
61
62 if (check_quit_flag ())
63 {
64 printf_filtered ("Cancelling download of %s %ps...\n",
65 data->desc,
66 styled_string (file_name_style.style (), data->fname));
67 return 1;
68 }
69
70 if (!data->has_printed && total != 0)
71 {
72 /* Print this message only once. */
73 data->has_printed = true;
74 printf_filtered ("Downloading %s %ps...\n",
75 data->desc,
76 styled_string (file_name_style.style (), data->fname));
77 }
78
79 return 0;
80 }
81
82 static debuginfod_client *
debuginfod_init()83 debuginfod_init ()
84 {
85 debuginfod_client *c = debuginfod_begin ();
86
87 if (c != nullptr)
88 debuginfod_set_progressfn (c, progressfn);
89
90 return c;
91 }
92
93 /* See debuginfod-support.h */
94
95 scoped_fd
debuginfod_source_query(const unsigned char * build_id,int build_id_len,const char * srcpath,gdb::unique_xmalloc_ptr<char> * destname)96 debuginfod_source_query (const unsigned char *build_id,
97 int build_id_len,
98 const char *srcpath,
99 gdb::unique_xmalloc_ptr<char> *destname)
100 {
101 if (getenv (DEBUGINFOD_URLS_ENV_VAR) == NULL)
102 return scoped_fd (-ENOSYS);
103
104 debuginfod_client *c = debuginfod_init ();
105
106 if (c == nullptr)
107 return scoped_fd (-ENOMEM);
108
109 user_data data ("source file", srcpath);
110
111 debuginfod_set_user_data (c, &data);
112 scoped_fd fd (debuginfod_find_source (c,
113 build_id,
114 build_id_len,
115 srcpath,
116 nullptr));
117
118 /* TODO: Add 'set debug debuginfod' command to control when error messages are shown. */
119 if (fd.get () < 0 && fd.get () != -ENOENT)
120 printf_filtered (_("Download failed: %s. Continuing without source file %ps.\n"),
121 safe_strerror (-fd.get ()),
122 styled_string (file_name_style.style (), srcpath));
123 else
124 destname->reset (xstrdup (srcpath));
125
126 debuginfod_end (c);
127 return fd;
128 }
129
130 /* See debuginfod-support.h */
131
132 scoped_fd
debuginfod_debuginfo_query(const unsigned char * build_id,int build_id_len,const char * filename,gdb::unique_xmalloc_ptr<char> * destname)133 debuginfod_debuginfo_query (const unsigned char *build_id,
134 int build_id_len,
135 const char *filename,
136 gdb::unique_xmalloc_ptr<char> *destname)
137 {
138 if (getenv (DEBUGINFOD_URLS_ENV_VAR) == NULL)
139 return scoped_fd (-ENOSYS);
140
141 debuginfod_client *c = debuginfod_init ();
142
143 if (c == nullptr)
144 return scoped_fd (-ENOMEM);
145
146 char *dname = nullptr;
147 user_data data ("separate debug info for", filename);
148
149 debuginfod_set_user_data (c, &data);
150 scoped_fd fd (debuginfod_find_debuginfo (c, build_id, build_id_len, &dname));
151
152 if (fd.get () < 0 && fd.get () != -ENOENT)
153 printf_filtered (_("Download failed: %s. Continuing without debug info for %ps.\n"),
154 safe_strerror (-fd.get ()),
155 styled_string (file_name_style.style (), filename));
156
157 destname->reset (dname);
158 debuginfod_end (c);
159 return fd;
160 }
161 #endif
162